The world's best-selling Bluetooth tracker, easily attach Mate to keys, backpacks and bags. Use the free app (on Android AND MORE) to ring your Tile Mate within 250 feet. If you're further away, use the app to view its most recent location. If you've lost your phone, tap the button on the Tile to ring it. This high-performance finder has a 3 year battery and is water resistant.  1.3" W x 1.3" H x 0.24" Thick